662. In ruling on such motion, in a cause tried without a jury, the
court may, on such terms as may be just, change or add to the
statement of decision, modify the judgment, in whole or in part,
vacate the judgment, in whole or in part, and grant a new trial on
all or part of the issues, or, in lieu of granting a new trial, may
vacate and set aside the statement of decision and judgment and
reopen the case for further proceedings and the introduction of
additional evidence with the same effect as if the case had been
reopened after the submission thereof and before a decision had been
filed or judgment rendered. Any judgment thereafter entered shall be
subject to the provisions of sections 657 and 659.